The Cobra strikes again with a single-piece lens that produces 180º distortion-free viewing and superior optical quality. Glasses feature upper brow protection, non-pressure co-molded temples and anti-slip silicone nose pads. The HD Lens provides a rate of transmission of visible light of 96%; versus 90 % for the classic clear lenses. This new coating sharply improves both perception and brightness and limits the effects of headaches and any visual fatigue. The hydrophobic technology also guarantees ideal water resistance. Glasses can be turned into a dust goggle, using the Foam and Strap Kit (#35165).